I did it a sort of reverse way. I bought Moxi 600s that I could upgrade with Flex. Which gave me some experience with the different tech levels at a low price. I could keep trialing them indefinitely at the (highest) Pro Level if I wanted. My wife is wearing them now and she couldn’t tell the difference in her use between 600 and Pro. So when they started beeping because the trial period was up, I intended to change them back to 600. But that was just before dinner, and TrueFit seemed to be telling me I’d need to copy her profile into a new one. I was probably missing something but the option to restart the trial was easier so I did that instead. BTW, the 6 week trial turned out to be more like 9 weeks. Maybe the aids can’t tell time?